Regular expressions (regex or regexp) are extremely useful in extracting information from any text by searching for one or more matches of a specific search pattern (i.e., a specific sequence of ASCII or unicode characters).

Fundamentals of Python Regex

Python provides the re module that is designed to handle regular expressions. Here's a brief overview of how you can use regex in Python:

• Compiling Regular Expressions: Regular expressions are compiled into pattern objects, which have methods for various operations such as searching for pattern matches or performing string substitutions.

• Performing Matches: You can use the compiled pattern to match against strings.

• Search and Replace: The sub() method replaces occurrences of the RE pattern in a string with another string.